分享PHP三种获取IP地址的代码
<?php function real_ip($type=0){ $ip = $_SERVER['REMOTE_ADDR']; if($type<=0 && isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) { foreach ($matches[0] AS $xip) { if (filter_var($xip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) { $ip = $xip; break; } } } elseif ($type<=0 && isset($_SERVER['HTTP_CLIENT_IP']) && filter_var($_SERVER['HTTP_CLIENT_IP'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif ($type<=1 && isset($_SERVER['HTTP_CF_CONNECTING_IP']) && filter_var($_SERVER['HTTP_CF_CONNECTING_IP'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) { $ip = $_SERVER['HTTP_CF_CONNECTING_IP']; } elseif ($type<=1 && isset($_SERVER['HTTP_X_REAL_IP']) && filter_var($_SERVER['HTTP_X_REAL_IP'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) { $ip = $_SERVER['HTTP_X_REAL_IP']; } return $ip; } echo real_ip(0).'<br>'.real_ip(1).'<br>'.real_ip(2).'<br>'; ?>
1、X_FORWARDED_FOR:极易被伪造IP
2、X_REAL_IP:在网站使用CDN的情况下选择此项,在不使用CDN的情况下也会被伪造
3、REMOTE_ADDR:直接获取真实请求IP,无法被伪造,但可能获取到的是CDN节点IP
© 版权声明
本网站的文章部分内容可能来源于网络,仅供大家学习与参考,如有侵权,请联系站长进行删除处理。Mail To:718588255@qq.com
THE END